?? (???)???????????????????????????
????:1?????600?????:???????
2??????
3???????????
4???????vx
5???????????
?? ??? ????
???
(?????)?1500??????
???
(?????)??????1500??
???
1/6
2??8??????,?????,18?????????????95.25?????????????75.25??,?????(????)??
???????:????
???? ????????????????????